The answer is B. Isogamy
b. smooth
c. cardiac
d. both
b. and
c.
The answer to the question is D.
A codon is made up of three nitrogen bases in an RNA molecule, each coding for a specific amino acid. It is an essential concept in understanding the production of proteins.
A codon in the biological context consists of three nitrogen bases. These nitrogenous bases are part of an RNA molecule. The bases can be adenine (A), guanine (G), cytosine (C), or uracil (U). Each codon represents and codes for a specific type of amino acid. As a result, a sequence of codons provides instructions for the construction of a protein. This is vital to understanding the central dogma of molecular biology—DNA makes RNA and RNA makes protein.
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mechanical weathering
chemical weathering
biological Weathering
The root of a huge tree causes cracks in a rocky surface.
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Part of a cliff breaks and falls due to waves.
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Acid rain reacts with calcite present in limestone,
Answer:
The root of a huge tree causes cracks in a rocky surface.---> biological Weathering.
Part of a cliff breaks and falls due to waves.----> mechanical weathering
Acid rain reacts with calcite present in limestone---> chemical weathering
Explanation:
The root of a huge tree causes cracks in a rocky surface is the example of biological Weathering because in this weathering living organism is involved. Part of a cliff breaks and falls due to waves of water is the example of mechanical weathering because water enters the small pores of rocks and formed cracks when expands. Acid rain reacts with calcite present in limestone is a chemical weathering because acid present in rain water is responsible for the degradation and breakdown of rocks.
Here's the matching of the scenarios with the types of weathering:
1. The root of a huge tree causes cracks in a rocky surface - Biological Weathering
2. Part of a cliff breaks and falls due to waves - Mechanical Weathering
3. Acid rain reacts with calcite present in limestone - Chemical Weathering
Biological Weathering: In this scenario, the root of a huge tree causes cracks in a rocky surface. Biological weathering refers to the breakdown of rocks caused by the activities of living organisms. The roots of the tree can exert pressure on the rocky surface as they grow, causing cracks and eventually breaking apart the rock.
Mechanical Weathering: Part of a cliff breaks and falls due to waves. Mechanical weathering involves the physical breakdown of rocks into smaller fragments without changing their chemical composition. In this case, the force of the waves pounding against the cliff causes pieces of the rock to break off and fall.
Chemical Weathering: Acid rain reacts with calcite present in limestone. Chemical weathering involves the breakdown of rocks through chemical reactions. Acid rain, which is rainwater with a low pH due to the presence of acidic compounds, reacts with the calcite (a mineral in limestone) and causes it to dissolve, leading to the erosion and weakening of the limestone.
Each type of weathering plays a role in shaping the Earth's surface over time, and they often work together to break down rocks and minerals into smaller particles.
To know more about Biological Weathering follow the link:
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Answer:
Receptors
Explanation:
The cell membrane has receptors integrated or embedded into to it known as Membrane receptors or trans-membrane receptors . Membrane receptors are specialized proteins and act in cell signalling by receiving extracellular molecules by binding to them.
In multi-cellular organisms cell signalling allows speciation o groups of cells and when the signal is released the membrane receptors are the ones that will receive it.